Gaston Mercier has designed a caliper very well thought out that it is for the equestrian excursion like extreme endurance. We already knew the first stirrups, which I had the opportunity to have on my first 90km endurance (and I can tell you that having such a long floor that you do well on 3 loops 30km!). We appreciated them already! But they were heavy … and clearly, support was not ideal.
So the bi-relax calipers are born. There are 2 versions, an Alu version and a carbon version. We will therefore focus on the case of carbon stirrups (even if the Alu have a similar geometry) since these are the ones we have. For a weight of 600g as tell you we are in the “ultra light”.